diff options
Diffstat (limited to 'nss')
| -rw-r--r-- | nss/Makefile | 57 | ||||
| -rw-r--r-- | nss/XXX-lookup.c | 51 | ||||
| -rw-r--r-- | nss/file-lookup.c | 22 | ||||
| -rw-r--r-- | nss/getXXbyYY.c | 71 | ||||
| -rw-r--r-- | nss/getXXbyYY_r.c | 129 | ||||
| -rw-r--r-- | nss/getXXent.c | 63 | ||||
| -rw-r--r-- | nss/getXXent_r.c | 222 | ||||
| -rw-r--r-- | nss/grp-lookup.c | 22 | ||||
| -rw-r--r-- | nss/host-lookup.c | 22 | ||||
| -rw-r--r-- | nss/network-lookup.c | 22 | ||||
| -rw-r--r-- | nss/nss_dns/dns-host.c | 611 | ||||
| -rw-r--r-- | nss/nss_dns/dns-network.c | 338 | ||||
| -rw-r--r-- | nss/nss_files/files-XXX.c | 221 | ||||
| -rw-r--r-- | nss/nss_files/files-grp.c | 49 | ||||
| -rw-r--r-- | nss/nss_files/files-hosts.c | 111 | ||||
| -rw-r--r-- | nss/nss_files/files-network.c | 54 | ||||
| -rw-r--r-- | nss/nss_files/files-parse.c | 171 | ||||
| -rw-r--r-- | nss/nss_files/files-proto.c | 48 | ||||
| -rw-r--r-- | nss/nss_files/files-pwd.c | 54 | ||||
| -rw-r--r-- | nss/nss_files/files-rpc.c | 48 | ||||
| -rw-r--r-- | nss/nss_files/files-service.c | 51 | ||||
| -rw-r--r-- | nss/nsswitch.c | 588 | ||||
| -rw-r--r-- | nss/nsswitch.h | 138 | ||||
| -rw-r--r-- | nss/proto-lookup.c | 22 | ||||
| -rw-r--r-- | nss/pwd-lookup.c | 22 | ||||
| -rw-r--r-- | nss/rpc-lookup.c | 22 | ||||
| -rw-r--r-- | nss/service-lookup.c | 22 |
27 files changed, 3251 insertions, 0 deletions
diff --git a/nss/Makefile b/nss/Makefile new file mode 100644 index 0000000000..91c4ef7380 --- /dev/null +++ b/nss/Makefile @@ -0,0 +1,57 @@ +# Copyright (C) 1996 Free Software Foundation, Inc. +# This file is part of the GNU C Library. + +# The GNU C Library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Library General Public License as +# published by the Free Software Foundation; either version 2 of the +# License, or (at your option) any later version. + +# The GNU C Library is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# Library General Public License for more details. + +# You should have received a copy of the GNU Library General Public +# License along with the GNU C Library; see the file COPYING.LIB. If +# not, write to the Free Software Foundation, Inc., +# 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +# +# Makefile for name service switch. +# +subdir := nss + +distribute := nsswitch.h XXX-lookup.c getXXbyYY.c getXXbyYY_r.c \ + getXXent.c getXXent_r.c + +# This is the trivial part which goes into libc itself. +routines := nsswitch \ + $(addsuffix -lookup,proto service host network \ + grp pwd rpc) + + +# Specify rules for the nss_* modules. We have some services. +services := files dns + +extra-libs = $(services:%=libnss_%) + +# The sources are found in the appropriate subdir. +subdir-dirs = nss_files nss_dns +vpath %.c $(subdir-dirs) + + +libnss_files-routines := files-proto files-service files-network \ + files-hosts files-grp files-pwd files-rpc +distribute += files-XXX.c files-parse.c + +libnss_dns-routines := dns-host dns-network + +libnss_files-inhibit-o = $(filter-out .so,$(object-suffixes)) +libnss_dns-inhibit-o = $(filter-out .so,$(object-suffixes)) + + +include ../Rules + + +resobjdir := $(firstword $(objdir) $(patsubst ../$(subdir),.,$(..)resolv)) +LDLIBS-nss_dns.so = -L$(resobjdir) -Wl,-rpath-link=$(resobjdir) -lresolv diff --git a/nss/XXX-lookup.c b/nss/XXX-lookup.c new file mode 100644 index 0000000000..1f8cbbf015 --- /dev/null +++ b/nss/XXX-lookup.c @@ -0,0 +1,51 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. +Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#include "nsswitch.h" + +/*******************************************************************\ +|* Here we assume one symbol to be defined: *| +|* *| +|* DATABASE_NAME - name of the database the function accesses *| +|* (e.g., hosts, servicess, ...) *| +|* *| +\*******************************************************************/ + +#define DB_LOOKUP_FCT CONCAT3_1 (__nss_, DATABASE_NAME, _lookup) +#define CONCAT3_1(Pre, Name, Post) CONCAT3_2 (Pre, Name, Post) +#define CONCAT3_2(Pre, Name, Post) Pre##Name##Post + +#define DATABASE_NAME_STRING STRINGIFY1 (DATABASE_NAME) +#define STRINGIFY1(Name) STRINGIFY2 (Name) +#define STRINGIFY2(Name) #Name + + +static service_user *database = NULL; + +int +DB_LOOKUP_FCT (service_user **ni, const char *fct_name, void **fctp) +{ + if (database == NULL + && __nss_database_lookup (DATABASE_NAME_STRING, &database) < 0) + return -1; + + *ni = database; + + return __nss_lookup (ni, fct_name, fctp); +} diff --git a/nss/file-lookup.c b/nss/file-lookup.c new file mode 100644 index 0000000000..d9f7c67320 --- /dev/null +++ b/nss/file-lookup.c @@ -0,0 +1,22 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. +Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#define DATABASE_NAME hosts + +#include "XXX-lookup.c" diff --git a/nss/getXXbyYY.c b/nss/getXXbyYY.c new file mode 100644 index 0000000000..5eb9ee9c87 --- /dev/null +++ b/nss/getXXbyYY.c @@ -0,0 +1,71 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#include "../nss/nsswitch.h" + +/*******************************************************************\ +|* Here we assume several symbols to be defined: *| +|* *| +|* LOOKUP_TYPE - the return type of the function *| +|* *| +|* FUNCTION_NAME - name of the non-reentrant function *| +|* *| +|* DATABASE_NAME - name of the database the function accesses *| +|* (e.g., host, services, ...) *| +|* *| +|* ADD_PARAMS - additional parameter, can vary in number *| +|* *| +|* ADD_VARIABLES - names of additional parameter *| +|* *| +|* BUFLEN - length of buffer allocated for the non *| +|* reentrant version *| +|* *| +|* Optionally the following vars can be defined: *| +|* *| +|* NEED_H_ERRNO - an extra parameter will be passed to point to *| +|* the global `h_errno' variable. *| +|* *| +\*******************************************************************/ + +/* To make the real sources a bit prettier. */ +#define REENTRANT_NAME APPEND_R (FUNCTION_NAME) +#define APPEND_R(name) APPEND_R1 (name) +#define APPEND_R1(name) name##_r + +/* Sometimes we need to store error codes in the `h_errno' variable. */ +#ifdef NEED_H_ERRNO +# define H_ERRNO_PARM , int *h_errnop +# define H_ERRNO_VAR , &h_errno +#else +# define H_ERRNO_PARM +# define H_ERRNO_VAR +#endif + + +/* Prototype for reentrant version we use here. */ +extern LOOKUP_TYPE *REENTRANT_NAME (ADD_PARAMS, LOOKUP_TYPE *result, + char *buffer, int buflen H_ERRNO_PARM); + +LOOKUP_TYPE * +FUNCTION_NAME (ADD_PARAMS) +{ + static LOOKUP_TYPE result; + static char buffer[BUFLEN]; + + return REENTRANT_NAME (ADD_VARIABLES, &result, buffer, BUFLEN H_ERRNO_VAR); +} diff --git a/nss/getXXbyYY_r.c b/nss/getXXbyYY_r.c new file mode 100644 index 0000000000..42092361be --- /dev/null +++ b/nss/getXXbyYY_r.c @@ -0,0 +1,129 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. +Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#include "nsswitch.h" + +/*******************************************************************\ +|* Here we assume several symbols to be defined: *| +|* *| +|* LOOKUP_TYPE - the return type of the function *| +|* *| +|* FUNCTION_NAME - name of the non-reentrant function *| +|* *| +|* DATABASE_NAME - name of the database the function accesses *| +|* (e.g., host, services, ...) *| +|* *| +|* ADD_PARAMS - additional parameter, can vary in number *| +|* *| +|* ADD_VARIABLES - names of additional parameter *| +|* *| +|* Optionally the following vars can be defined: *| +|* *| +|* NEED_H_ERRNO - an extra parameter will be passed to point to *| +|* the global `h_errno' variable. *| +|* *| +|* NEED__RES - the global _res variable might be used so we *| +|* will have to initialize it if necessary *| +|* *| +\*******************************************************************/ + +/* To make the real sources a bit prettier. */ +#define REENTRANT_NAME APPEND_R (FUNCTION_NAME) +#define APPEND_R(name) APPEND_R1 (name) +#define APPEND_R1(name) name##_r + +#define FUNCTION_NAME_STRING STRINGIZE (FUNCTION_NAME) +#define REENTRANT_NAME_STRING STRINGIZE (REENTRANT_NAME) +#define DATABASE_NAME_STRING STRINGIZE (DATABASE_NAME) +#define STRINGIZE(name) STRINGIZE1 (name) +#define STRINGIZE1(name) #name + +#define DB_LOOKUP_FCT CONCAT3_1 (__nss_, DATABASE_NAME, _lookup) +#define CONCAT3_1(Pre, Name, Post) CONCAT3_2 (Pre, Name, Post) +#define CONCAT3_2(Pre, Name, Post) Pre##Name##Post + +/* Sometimes we need to store error codes in the `h_errno' variable. */ +#ifdef NEED_H_ERRNO +# define H_ERRNO_PARM , int *h_errnop +# define H_ERRNO_VAR , h_errnop +#else +# define H_ERRNO_PARM +# define H_ERRNO_VAR +#endif + + +/* Type of the lookup function we need here. */ +typedef int (*lookup_function) (ADD_PARAMS, LOOKUP_TYPE *, char *, int + H_ERRNO_PARM); + +/* Some usages of this file might use this variable. */ +extern struct __res_state _res; + +/* The lookup function for the first entry of this service. */ +extern int DB_LOOKUP_FCT (service_user **nip, const char *name, void **fctp); + + + +LOOKUP_TYPE * +REENTRANT_NAME (ADD_PARAMS, LOOKUP_TYPE *result, char *buffer, int buflen + H_ERRNO_PARM) +{ + static service_user *startp = NULL; + static lookup_function start_fct; + service_user *nip; + lookup_function fct; + int no_more; + enum nss_status status = NSS_STATUS_UNAVAIL; + + if (startp == NULL) + { + no_more = DB_LOOKUP_FCT (&nip, REENTRANT_NAME_STRING, (void **) &fct); + if (no_more) + startp = (service_user *) -1; + else + { + startp = nip; + start_fct = fct; + +#ifdef NEED__RES + /* The resolver code will really be used so we have to + initialize it. */ + if ((_res.options & RES_INIT) == 0 && res_init () == -1) + { + h_errno = NETDB_INTERNAL; + return NULL; + } +#endif /* need _res */ + } + } + else + { + fct = start_fct; + no_more = (nip = startp) == (service_user *) -1; + } + + while (no_more == 0) + { + status = (*fct) (ADD_VARIABLES, result, buffer, buflen H_ERRNO_VAR); + + no_more = __nss_next (&nip, REENTRANT_NAME_STRING, &fct, status, 0); + } + + return status == NSS_STATUS_SUCCESS ? result : NULL; +} diff --git a/nss/getXXent.c b/nss/getXXent.c new file mode 100644 index 0000000000..da3712c70f --- /dev/null +++ b/nss/getXXent.c @@ -0,0 +1,63 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#include "nsswitch.h" + +/*******************************************************************\ +|* Here we assume several symbols to be defined: *| +|* *| +|* LOOKUP_TYPE - the return type of the function *| +|* *| +|* GETFUNC_NAME - name of the non-reentrant getXXXent function *| +|* *| +|* BUFLEN - size of static buffer *| +|* *| +|* Optionally the following vars can be defined: *| +|* *| +|* NEED_H_ERRNO - an extra parameter will be passed to point to *| +|* the global `h_errno' variable. *| +|* *| +\*******************************************************************/ + +/* To make the real sources a bit prettier. */ +#define REENTRANT_GETNAME APPEND_R (GETFUNC_NAME) +#define APPEND_R(name) APPEND_R1 (name) +#define APPEND_R1(name) name##_r + +/* Sometimes we need to store error codes in the `h_errno' variable. */ +#ifdef NEED_H_ERRNO +# define H_ERRNO_PARM , int *h_errnop +# define H_ERRNO_VAR , &h_errno +#else +# define H_ERRNO_PARM +# define H_ERRNO_VAR +#endif + +/* Prototype of the reentrant version. */ +LOOKUP_TYPE *REENTRANT_GETNAME (LOOKUP_TYPE *result, char *buffer, + int buflen H_ERRNO_PARM); + + +LOOKUP_TYPE * +GETFUNC_NAME (void) +{ + static char buffer[BUFLEN]; + LOOKUP_TYPE result; + + return REENTRANT_GETNAME (&result, buffer, BUFLEN H_ERRNO_VAR); +} diff --git a/nss/getXXent_r.c b/nss/getXXent_r.c new file mode 100644 index 0000000000..3d1e9593e6 --- /dev/null +++ b/nss/getXXent_r.c @@ -0,0 +1,222 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. +Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#include <libc-lock.h> + +#include "nsswitch.h" + +/*******************************************************************\ +|* Here we assume several symbols to be defined: *| +|* *| +|* LOOKUP_TYPE - the return type of the function *| +|* *| +|* SETFUNC_NAME - name of the non-reentrant setXXXent function *| +|* *| +|* GETFUNC_NAME - name of the non-reentrant getXXXent function *| +|* *| +|* ENDFUNC_NAME - name of the non-reentrant endXXXent function *| +|* *| +|* DATABASE_NAME - name of the database the function accesses *| +|* (e.g., host, services, ...) *| +|* *| +|* Optionally the following vars can be defined: *| +|* *| +|* STAYOPEN - variable declaration for setXXXent function *| +|* *| +|* STAYOPEN_VAR - variable name for setXXXent function *| +|* *| +|* NEED_H_ERRNO - an extra parameter will be passed to point to *| +|* the global `h_errno' variable. *| +|* *| +\*******************************************************************/ + +/* To make the real sources a bit prettier. */ +#define REENTRANT_GETNAME APPEND_R (GETFUNC_NAME) +#define APPEND_R(name) APPEND_R1 (name) +#define APPEND_R1(name) name##_r + +#define SETFUNC_NAME_STRING STRINGIZE (SETFUNC_NAME) +#define GETFUNC_NAME_STRING STRINGIZE (GETFUNC_NAME) +#define ENDFUNC_NAME_STRING STRINGIZE (ENDFUNC_NAME) +#define DATABASE_NAME_STRING STRINGIZE (DATABASE_NAME) +#define STRINGIZE(name) STRINGIZE1 (name) +#define STRINGIZE1(name) #name + +#define DB_LOOKUP_FCT CONCAT3_1 (__nss_, DATABASE_NAME, _lookup) +#define CONCAT3_1(Pre, Name, Post) CONCAT3_2 (Pre, Name, Post) +#define CONCAT3_2(Pre, Name, Post) Pre##Name##Post + +/* Sometimes we need to store error codes in the `h_errno' variable. */ +#ifdef NEED_H_ERRNO +# define H_ERRNO_PARM , int *h_errnop +# define H_ERRNO_VAR , &h_errno +#else +# define H_ERRNO_PARM +# define H_ERRNO_VAR +#endif + +/* Some databases take the `stayopen' flag. */ +#ifndef STAYOPEN +#define STAYOPEN void +#define STAYOPEN_VAR +#endif + +/* Prototype for the setXXXent functions we use here. */ +typedef int (*set_function) (STAYOPEN); + +/* Prototype for the endXXXent functions we use here. */ +typedef int (*end_function) (void); + +/* Prototype for the setXXXent functions we use here. */ +typedef int (*get_function) (LOOKUP_TYPE *, char *, int H_ERRNO_PARM); + + +/* This handle for the NSS data base is shared between all + set/get/endXXXent functions. */ +static service_user *nip; +/* Remember the first service_entry, it's always the same. */ +static service_user *startp; + +/* Protect above variable against multiple uses at the same time. */ +__libc_lock_define_initialized (static, lock); + +/* The lookup function for the first entry of this service. */ +extern int DB_LOOKUP_FCT (service_user **nip, const char *name, void **fctp); + + +void +APPEND_R (SETFUNC_NAME) (STAYOPEN) +{ + set_function fct; + int no_more; + +#ifdef NEED__RES + if ((_res.options & RES_INIT) == 0 && res_init () == -1) + { + h_errno = NETDB_INTERNAL; + return NULL; + } +#endif /* need _res */ + + __libc_lock_lock (lock); + + if (startp == NULL) + { + no_more = DB_LOOKUP_FCT (&nip, SETFUNC_NAME_STRING, (void **) &fct); + startp = no_more == 0 ? (service_user *) -1 : nip; + } + else + no_more = (nip = startp) != (service_user *) -1; + + /* Cycle through all the services and run their setXXent functions. */ + while (! no_more) + { + /* Ignore status, we force check in __NSS_NEXT. */ + (void) (*fct) (STAYOPEN_VAR); + + no_more = __nss_next (&nip, SETFUNC_NAME_STRING, (void **) &fct, 0, 1); + } + + __libc_lock_unlock (lock); +} + + +void +APPEND_R (ENDFUNC_NAME) (void) +{ + end_function fct; + int no_more; + +#ifdef NEED__RES + if ((_res.options & RES_INIT) == 0 && res_init () == -1) + { + h_errno = NETDB_INTERNAL; + return NULL; + } +#endif /* need _res */ + + __libc_lock_lock (lock); + + if (startp == NULL) + { + no_more = DB_LOOKUP_FCT (&nip, SETFUNC_NAME_STRING, (void **) &fct); + startp = no_more == 0 ? (service_user *) -1 : nip; + } + else + no_more = (nip = startp) != (service_user *) -1; + + /* Cycle through all the services and run their endXXent functions. */ + while (no_more == 0) + { + /* Ignore status, we force check in __NSS_NEXT. */ + (void) (*fct) (); + + no_more = __nss_next (&nip, ENDFUNC_NAME_STRING, (void **) &fct, 0, 1); + } + + __libc_lock_unlock (lock); +} + + +LOOKUP_TYPE * +REENTRANT_GETNAME (LOOKUP_TYPE *result, char *buffer, int buflen H_ERRNO_PARM) +{ + get_function fct; + int no_more; + enum nss_status status = NSS_STATUS_NOTFOUND; + +#ifdef NEED__RES + if ((_res.options & RES_INIT) == 0 && res_init () == -1) + { + h_errno = NETDB_INTERNAL; + return NULL; + } +#endif /* need _res */ + + __libc_lock_lock (lock); + + if (nip) + /* Continuing a walk-through started before. */ + no_more = 0; + else + { + if (startp == NULL) + { + no_more = DB_LOOKUP_FCT (&nip, SETFUNC_NAME_STRING, (void **) &fct); + startp = no_more == 0 ? (service_user *) -1 : nip; + } + else + no_more = (nip = startp) != (service_user *) -1; + + if (no_more != 0) + status = NSS_STATUS_UNAVAIL; + } + + while (no_more == 0) + { + status = (*fct) (result, buffer, buflen H_ERRNO_VAR); + + no_more = __nss_next (&nip, GETFUNC_NAME_STRING, (void **) &fct, + status, 0); + } + + __libc_lock_unlock (lock); + + return status == NSS_STATUS_SUCCESS ? result : NULL; +} diff --git a/nss/grp-lookup.c b/nss/grp-lookup.c new file mode 100644 index 0000000000..ce3753c665 --- /dev/null +++ b/nss/grp-lookup.c @@ -0,0 +1,22 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. +Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#define DATABASE_NAME group + +#include "XXX-lookup.c" diff --git a/nss/host-lookup.c b/nss/host-lookup.c new file mode 100644 index 0000000000..d9f7c67320 --- /dev/null +++ b/nss/host-lookup.c @@ -0,0 +1,22 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. +Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#define DATABASE_NAME hosts + +#include "XXX-lookup.c" diff --git a/nss/network-lookup.c b/nss/network-lookup.c new file mode 100644 index 0000000000..ab6e51f5c4 --- /dev/null +++ b/nss/network-lookup.c @@ -0,0 +1,22 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. +Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#define DATABASE_NAME networks + +#include "XXX-lookup.c" diff --git a/nss/nss_dns/dns-host.c b/nss/nss_dns/dns-host.c new file mode 100644 index 0000000000..eaa9e81218 --- /dev/null +++ b/nss/nss_dns/dns-host.c @@ -0,0 +1,611 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. +Extended from original form by Ulrich Drepper <drepper@cygnus.com>, 1996. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +/* Parts of this file are plain copies of the file `getnetnamadr.c' from + the bind package and it has the following copyright. */ + +/* Copyright (c) 1993 Carlos Leandro and Rui Salgueiro + * Dep. Matematica Universidade de Coimbra, Portugal, Europe + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + */ +/* + * Copyright (c) 1983, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <ctype.h> +#include <errno.h> +#include <netdb.h> +#include <stdio.h> +#include <stdlib.h> +#include <stddef.h> +#include <string.h> +#include <sys/syslog.h> + +#include <netinet/in.h> +#include <arpa/inet.h> +#include <arpa/nameser.h> +#include <resolv.h> + +#include "nsswitch.h" + +/* Get implementation for some internal functions. */ +#include "../resolv/mapv4v6addr.h" +#include "../resolv/mapv4v6hostent.h" + +/* Maximum number of aliases we allow. */ +#define MAX_NR_ALIASES 48 +#define MAX_NR_ADDRS 48 + +#if PACKETSZ > 1024 +# define MAXPACKET PACKETSZ +#else +# define MAXPACKET 1024 +#endif + +static const char AskedForGot[] = "\ +gethostby*.getanswer: asked for \"%s\", got \"%s\""; + + +/* We need this time later. */ +typedef union querybuf +{ + HEADER hdr; + u_char buf[MAXPACKET]; +} querybuf; + + +static enum nss_status getanswer_r (const querybuf *answer, int anslen, + const char *qname, int qtype, + struct hostent *result, + char *buffer, int buflen, int *h_errnop); + +enum nss_status +_nss_dns_gethostbyname2_r (const char *name, int af, struct hostent *result, + char *buffer, int buflen, int *h_errnop) +{ + struct host_data + { + char *aliases[MAX_NR_ALIASES]; + unsigned char host_addr[16]; /* IPv4 or IPv6 */ + char *h_addr_ptrs[MAX_NR_ADDRS + 1]; + char linebuffer[0]; + } *host_data = (struct host_data *) buffer; + int linebuflen = buflen - offsetof (struct host_data, linebuffer); + querybuf host_buffer; + int size, type, n; + const char *cp; + + switch (af) { + case AF_INET: + size = INADDRSZ; + type = T_A; + break; + case AF_INET6: + size = IN6ADDRSZ; + type = T_AAAA; + break; + default: + *h_errnop = NETDB_INTERNAL; + errno = EAFNOSUPPORT; + return NSS_STATUS_UNAVAIL; + } + + result->h_addrtype = af; + result->h_length = size; + + /* + * if there aren't any dots, it could be a user-level alias. + * this is also done in res_query() since we are not the only + * function that looks up host names. + */ + if (strchr (name, '.') == NULL && (cp = __hostalias (name)) != NULL) + name = cp; + + /* + * disallow names consisting only of digits/dots, unless + * they end in a dot. + */ + if (isdigit (name[0])) + for (cp = name;; ++cp) + { + if (*cp == '\0') + { + char *bp; + + if (*--cp == '.') + break; + /* + * All-numeric, no dot at the end. Fake up a hostent + * as if we'd actually done a lookup. + */ + if (inet_pton (af, name, host_data->host_addr) <= 0) + { + *h_errnop = HOST_NOT_FOUND; + return NSS_STATUS_NOTFOUND; + } + + bp = __stpncpy (host_data->linebuffer, name, linebuflen); + host_data->linebuffer[linebuflen - 1] = '\0'; + linebuflen -= bp - host_data->linebuffer; + + result->h_name = host_data->linebuffer; + result->h_aliases = host_data->aliases; + host_data->aliases[0] = NULL; + host_data->h_addr_ptrs[0] = (char *) host_data->host_addr; + host_data->h_addr_ptrs[1] = NULL; + result->h_addr_list = host_data->h_addr_ptrs; + + if (_res.options & RES_USE_INET6) + map_v4v6_hostent (result, &bp, &linebuflen); + *h_errnop = NETDB_SUCCESS; + return NSS_STATUS_SUCCESS; + } + if (!isdigit (*cp) && *cp != '.') + break; + } + + n = res_search (name, C_IN, type, host_buffer.buf, sizeof (host_buffer)); + if (n < 0) + return errno == ECONNREFUSED ? NSS_STATUS_UNAVAIL : NSS_STATUS_NOTFOUND; + + return getanswer_r (&host_buffer, n, name, type, result, buffer, buflen, + h_errnop); +} + + +enum nss_status +_nss_dns_gethostbyname_r (const char *name, struct hostent *result, + char *buffer, int buflen, int *h_errnop) +{ + enum nss_status status = NSS_STATUS_NOTFOUND; + + if (_res.options & RES_USE_INET6) + status = _nss_dns_gethostbyname2_r (name, AF_INET6, result, buffer, + buflen, h_errnop); + if (status == NSS_STATUS_NOTFOUND) + status = _nss_dns_gethostbyname2_r (name, AF_INET, result, buffer, + buflen, h_errnop); + + return status; +} + + +enum nss_status +_nss_dns_gethostbyaddr_r (const char *addr, int len, int af, + struct hostent *result, char *buffer, int buflen, + int *h_errnop) +{ + static const u_char mapped[] = { 0,0, 0,0, 0,0, 0,0, 0,0, 0xff,0xff }; + static const u_char tunnelled[] = { 0,0, 0,0, 0,0, 0,0, 0,0, 0,0 }; + const u_char *uaddr = (const u_char *)addr; + struct host_data + { + char *aliases[MAX_NR_ALIASES]; + unsigned char host_addr[16]; /* IPv4 or IPv6 */ + char *h_addr_ptrs[MAX_NR_ADDRS + 1]; + char linebuffer[0]; + } *host_data = (struct host_data *) buffer; + querybuf host_buffer; + char qbuf[MAXDNAME+1], *qp; + int size, n, status; + + if (af == AF_INET6 && len == IN6ADDRSZ && + (bcmp (uaddr, mapped, sizeof mapped) == 0 + || bcmp (uaddr, tunnelled, sizeof tunnelled) == 0)) + { + /* Unmap. */ + addr += sizeof mapped; + uaddr += sizeof mapped; + af = AF_INET; + len = INADDRSZ; + } + + switch (af) + { + case AF_INET: + size = INADDRSZ; + break; + case AF_INET6: + size = IN6ADDRSZ; + break; + default: + errno = EAFNOSUPPORT; + *h_errnop = NETDB_INTERNAL; + return NSS_STATUS_UNAVAIL; + } + if (size != len) + { + errno = EAFNOSUPPORT; + *h_errnop = NETDB_INTERNAL; + return NSS_STATUS_UNAVAIL; + } + + switch (af) + { + case AF_INET: + sprintf (qbuf, "%u.%u.%u.%u.in-addr.arpa", (uaddr[3] & 0xff), + (uaddr[2] & 0xff), (uaddr[1] & 0xff), (uaddr[0] & 0xff)); + break; + case AF_INET6: + qp = qbuf; + for (n = IN6ADDRSZ - 1; n >= 0; n--) + qp += sprintf (qp, "%x.%x.", uaddr[n] & 0xf, (uaddr[n] >> 4) & 0xf); + strcpy(qp, "ip6.int"); + break; + default: + /* Cannot happen. */ + } + + n = res_query (qbuf, C_IN, T_PTR, (u_char *)host_buffer.buf, + sizeof host_buffer); + if (n < 0) + return errno == ECONNREFUSED ? NSS_STATUS_UNAVAIL : NSS_STATUS_NOTFOUND; + + status = getanswer_r (&host_buffer, n, qbuf, T_PTR, result, buffer, buflen, + h_errnop); + if (status != NSS_STATUS_SUCCESS) + return status; + +#ifdef SUNSECURITY + This is not implemented because it is not possible to use the current + source from bind in a multi-threaded program. +#endif + + result->h_addrtype = af; + result->h_length = len; + bcopy (addr, host_data->host_addr, len); + host_data->h_addr_ptrs[0] = (char *) host_data->host_addr; + host_data->h_addr_ptrs[1] = NULL; + if (af == AF_INET && (_res.options & RES_USE_INET6)) + { + map_v4v6_address ((char *) host_data->host_addr, + (char *) host_data->host_addr); + result->h_addrtype = AF_INET6; + result->h_length = IN6ADDRSZ; + } + *h_errnop = NETDB_SUCCESS; + return NSS_STATUS_SUCCESS; +} + + +static enum nss_status +getanswer_r (const querybuf *answer, int anslen, const char *qname, int qtype, + struct hostent *result, char *buffer, int buflen, int *h_errnop) +{ + struct host_data + { + char *aliases[MAX_NR_ALIASES]; + unsigned char host_addr[16]; /* IPv4 or IPv6 */ + char *h_addr_ptrs[MAX_NR_ADDRS + 1]; + char linebuffer[0]; + } *host_data = (struct host_data *) buffer; + int linebuflen = buflen - offsetof (struct host_data, linebuffer); + register const HEADER *hp; + const u_char *end_of_message, *cp; + int n, ancount, qdcount; + int haveanswer, had_error; + char *bp, **ap, **hap; + char tbuf[MAXDNAME+1]; + const char *tname; + int (*name_ok) __P ((const char *)); + + tname = qname; + result->h_name = NULL; + end_of_message = answer->buf + anslen; + switch (qtype) + { + case T_A: + case T_AAAA: + name_ok = res_hnok; + break; + case T_PTR: + name_ok = res_dnok; + break; + default: + return NSS_STATUS_UNAVAIL; /* XXX should be abort(); */ + } + + /* + * find first satisfactory answer + */ + hp = &answer->hdr; + bp = host_data->linebuffer; + ancount = ntohs (hp->ancount); + qdcount = ntohs (hp->qdcount); + cp = answer->buf + HFIXEDSZ; + if (qdcount != 1) + { + *h_errnop = NO_RECOVERY; + return NSS_STATUS_UNAVAIL; + } + + n = dn_expand (answer->buf, end_of_message, cp, bp, linebuflen); + if (n < 0 || (*name_ok) (bp) == 0) + { + *h_errnop = NO_RECOVERY; + return NSS_STATUS_UNAVAIL; + } + cp += n + QFIXEDSZ; + + if (qtype == T_A || qtype == T_AAAA) + { + /* res_send() has already verified that the query name is the + * same as the one we sent; this just gets the expanded name + * (i.e., with the succeeding search-domain tacked on). + */ + n = strlen (bp) + 1; /* for the \0 */ + result->h_name = bp; + bp += n; + linebuflen -= n; + /* The qname can be abbreviated, but h_name is now absolute. */ + qname = result->h_name; + } + + ap = host_data->aliases; + *ap = NULL; + result->h_aliases = host_data->aliases; + hap = host_data->h_addr_ptrs; + *hap = NULL; + result->h_addr_list = host_data->h_addr_ptrs; + haveanswer = 0; + had_error = 0; + + while (ancount-- > 0 && cp < end_of_message && had_error == 0) + { + int type, class; + + n = dn_expand (answer->buf, end_of_message, cp, bp, linebuflen); + if (n < 0 || (*name_ok) (bp) == 0) + { + ++had_error; + continue; + } + cp += n; /* name */ + type = _getshort (cp); + cp += INT16SZ; /* type */ + class = _getshort(cp); + cp += INT16SZ + INT32SZ; /* class, TTL */ + n = _getshort(cp); + cp += INT16SZ; /* len */ + if (class != C_IN) + { + /* XXX - debug? syslog? */ + cp += n; + continue; /* XXX - had_error++ ? */ + } + + if ((qtype ==T_A || qtype == T_AAAA) && type == T_CNAME) + { + if (ap >= &host_data->aliases[MAX_NR_ALIASES - 1]) + continue; + n = dn_expand (answer->buf, end_of_message, cp, tbuf, sizeof tbuf); + if (n < 0 || (*name_ok) (tbuf) == 0) + { + ++had_error; + continue; + } + cp += n; + /* Store alias. */ + *ap++ = bp; + n = strlen (bp) + 1; /* For the \0. */ + bp += n; + linebuflen -= n; + /* Get canonical name. */ + n = strlen (tbuf) + 1; /* For the \0. */ + if (n > buflen) + { + ++had_error; + continue; + } + strcpy (bp, tbuf); + result->h_name = bp; + bp += n; + linebuflen -= n; + continue; + } + + if (qtype == T_PTR && type == T_CNAME) + { + n = dn_expand (answer->buf, end_of_message, cp, tbuf, sizeof tbuf); + if (n < 0 || res_hnok (tbuf) == 0) + { + ++had_error; + continue; + } + cp += n; + /* Get canonical name. */ + n = strlen (tbuf) + 1; /* For the \0. */ + if (n > buflen) + { + ++had_error; + continue; + } + strcpy (bp, tbuf); + tname = bp; + bp += n; + linebuflen -= n; + continue; + } + if (type != qtype) + { + syslog (LOG_NOTICE | LOG_AUTH, + "gethostby*.getanswer: asked for \"%s %s %s\", got type \"%s\"", + qname, p_class (C_IN), p_type (qtype), p_type (type)); + cp += n; + continue; /* XXX - had_error++ ? */ + } + + switch (type) + { + case T_PTR: + if (strcasecmp (tname, bp) != 0) + { + syslog (LOG_NOTICE | LOG_AUTH, AskedForGot, qname, bp); + cp += n; + continue; /* XXX - had_error++ ? */ + } + n = dn_expand (answer->buf, end_of_message, cp, bp, linebuflen); + if (n < 0 || res_hnok (bp) == 0) + { + ++had_error; + break; + } +#if MULTI_PTRS_ARE_ALIASES + cp += n; + if (haveanswer == 0) + result->h_name = bp; + else if (ap < &host_data->aliases[MAXALIASES-1]) + *ap++ = bp; + else + n = -1; + if (n != -1) + { + n = strlen (bp) + 1; /* for the \0 */ + bp += n; + linebuflen -= n; + } + break; +#else + result->h_name = bp; + if (_res.options & RES_USE_INET6) + { + n = strlen (bp) + 1; /* for the \0 */ + bp += n; + linebuflen -= n; + map_v4v6_hostent (result, &bp, &linebuflen); + } + *h_errnop = NETDB_SUCCESS; + return NSS_STATUS_SUCCESS; +#endif + case T_A: + case T_AAAA: + if (strcasecmp (result->h_name, bp) != 0) + { + syslog (LOG_NOTICE | LOG_AUTH, AskedForGot, result->h_name, bp); + cp += n; + continue; /* XXX - had_error++ ? */ + } + if (haveanswer) + { + if (n != result->h_length) + { + cp += n; + continue; + } + } + else + { + register int nn; + + result->h_name = bp; + nn = strlen (bp) + 1; /* for the \0 */ + bp += nn; + linebuflen -= nn; + } + + bp += sizeof (align) - ((u_long) bp % sizeof (align)); + + if (n >= linebuflen) + { + ++had_error; + continue; + } + if (hap >= &host_data->h_addr_ptrs[MAX_NR_ADDRS-1]) + { + cp += n; + continue; + } + bcopy (cp, *hap++ = bp, n); + bp += n; + cp += n; + linebuflen -= n; + break; + default: + abort (); + } + if (had_error == 0) + ++haveanswer; + } + + if (haveanswer > 0) + { + *ap = NULL; + *hap = NULL; +#if defined(RESOLVSORT) + /* + * Note: we sort even if host can take only one address + * in its return structures - should give it the "best" + * address in that case, not some random one + */ + if (_res.nsort && haveanswer > 1 && qtype == T_A) + addrsort (host_data->h_addr_ptrs, haveanswer); +#endif /*RESOLVSORT*/ + + if (result->h_name == NULL) + { + n = strlen (qname) + 1; /* For the \0. */ + if (n > linebuflen) + goto try_again; + strcpy (bp, qname); + result->h_name = bp; + bp += n; + linebuflen -= n; + } + + if (_res.options & RES_USE_INET6) + map_v4v6_hostent (result, &bp, &linebuflen); + *h_errnop = NETDB_SUCCESS; + return NSS_STATUS_SUCCESS; + } +try_again: + *h_errnop = TRY_AGAIN; + return NSS_STATUS_TRYAGAIN; +} diff --git a/nss/nss_dns/dns-network.c b/nss/nss_dns/dns-network.c new file mode 100644 index 0000000000..b714128f1d --- /dev/null +++ b/nss/nss_dns/dns-network.c @@ -0,0 +1,338 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. +Extended from original form by Ulrich Drepper <drepper@cygnus.com>, 1996. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +/* Parts of this file are plain copies of the file `getnetnamadr.c' from + the bind package and it has the following copyright. */ + +/* Copyright (c) 1993 Carlos Leandro and Rui Salgueiro + * Dep. Matematica Universidade de Coimbra, Portugal, Europe + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + */ +/* + * Copyright (c) 1983, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <ctype.h> +#include <errno.h> +#include <netdb.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "nsswitch.h" +#include <arpa/inet.h> + +/* Maximum number of aliases we allow. */ +#define MAX_NR_ALIASES 48 + + +#if PACKETSZ > 1024 +#define MAXPACKET PACKETSZ +#else +#define MAXPACKET 1024 +#endif + + +typedef enum +{ + BYADDR, + BYNAME +} lookup_method; + + +/* We need this time later. */ +typedef union querybuf +{ + HEADER hdr; + u_char buf[MAXPACKET]; +} querybuf; + + +/* Protortypes for local functions. */ +static int getanswer_r (const querybuf *answer, int anslen, + struct netent *result, char *buffer, int buflen, + lookup_method net_i); + + +int +_nss_dns_getnetbyname_r (const char *name, struct netent *result, + char *buffer, int buflen) +{ + /* Return entry for network with NAME. */ + querybuf net_buffer; + int anslen; + char *qbuf; + + qbuf = strdupa (name); + anslen = res_search (qbuf, C_IN, T_PTR, (u_char *) &net_buffer, + sizeof (querybuf)); + if (anslen < 0) + /* Nothing found. */ + return errno == ECONNREFUSED ? NSS_STATUS_UNAVAIL : NSS_STATUS_NOTFOUND; + + return getanswer_r (&net_buffer, anslen, result, buffer, buflen, BYNAME); +} + + +int +_nss_dns_getnetbyaddr_r (long net, int type, struct netent *result, + char *buffer, int buflen) +{ + /* Return entry for network with NAME. */ + int status; + querybuf net_buffer; + unsigned int net_bytes[4]; + char qbuf[MAXDNAME]; + int cnt, anslen; + u_int32_t net2; + + /* No net address lookup for IPv6 yet. */ + if (type != AF_INET) + return NSS_STATUS_UNAVAIL; + + net2 = (u_int32_t) net; + for (cnt = 4; net2 != 0; net2 >>= 8) + net_bytes[--cnt] = net2 & 0xff; + + switch (cnt) + { + case 3: + /* Class A network. */ + sprintf (qbuf, "0.0.0.%u.in-addr.arpa", net_bytes[3]); + break; + case 2: + /* Class B network. */ + sprintf (qbuf, "0.0.%u.%u.in-addr.arpa", net_bytes[3], net_bytes[2]); + break; + case 1: + /* Class C network. */ + sprintf (qbuf, "0.%u.%u.%u.in-addr.arpa", net_bytes[3], net_bytes[2], + net_bytes[1]); + break; + case 0: + /* Class D - E network. */ + sprintf (qbuf, "%u.%u.%u.%u.in-addr.arpa", net_bytes[3], net_bytes[2], + net_bytes[1], net_bytes[0]); + break; + } + + anslen = res_query (qbuf, C_IN, T_PTR, (u_char *) &net_buffer, + sizeof (querybuf)); + if (anslen < 0) + /* Nothing found. */ + return errno == ECONNREFUSED ? NSS_STATUS_UNAVAIL : NSS_STATUS_NOTFOUND; + + status = getanswer_r (&net_buffer, anslen, result, buffer, buflen, BYADDR); + if (status == NSS_STATUS_SUCCESS) + { + /* Strip trailing zeros. */ + unsigned int u_net = net; /* Maybe net should be unsigned? */ + + while ((u_net & 0xff) == 0 && u_net != 0) + u_net >>= 8; + result->n_net = u_net; + } + + return status; +} + + +#undef offsetof +#define offsetof(Type, Member) ((size_t) &((Type *) NULL)->Member) + +static int +getanswer_r (const querybuf *answer, int anslen, struct netent *result, + char *buffer, int buflen, lookup_method net_i) +{ + /* + * Find first satisfactory answer + * + * answer --> +------------+ ( MESSAGE ) + * | Header | + * +------------+ + * | Question | the question for the name server + * +------------+ + * | Answer | RRs answering the question + * +------------+ + * | Authority | RRs pointing toward an authority + * | Additional | RRs holding additional information + * +------------+ + */ + struct net_data + { + char *aliases[MAX_NR_ALIASES]; + char linebuffer[0]; + } *net_data = (struct net_data *) buffer; + int linebuflen = buflen - offsetof (struct net_data, linebuffer); + const char *end_of_message = &answer->buf[anslen]; + const HEADER *header_pointer = &answer->hdr; + /* #/records in the answer section. */ + int answer_count = ntohs (header_pointer->ancount); + /* #/entries in the question section. */ + int question_count = ntohs (header_pointer->qdcount); + char *bp = net_data->linebuffer; + const char *cp = &answer->buf[HFIXEDSZ]; + char **alias_pointer; + int have_answer; + char *ans; + + if (question_count == 0) + /* FIXME: the Sun version uses for host name lookup an additional + parameter for pointing to h_errno. this is missing here. + OSF/1 has a per-thread h_errno variable. */ + if (header_pointer->aa != 0) + { + h_errno = HOST_NOT_FOUND; + return NSS_STATUS_NOTFOUND; + } + else + { + h_errno = TRY_AGAIN; + return NSS_STATUS_TRYAGAIN; + } + + /* Skip the question part. */ + while (question_count-- > 0) + cp += __dn_skipname (cp, end_of_message) + QFIXEDSZ; + + alias_pointer = result->n_aliases = &net_data->aliases[0]; + *alias_pointer = NULL; + have_answer = 0; + ans = NULL; + + while (--answer_count >= 0 && cp < end_of_message) + { + int n = dn_expand (answer->buf, end_of_message, cp, bp, linebuflen); + int type, class; + + if (n < 0 || res_dnok (bp) == 0) + break; + cp += n; + ans = strdupa (bp); + GETSHORT (type, cp); + GETSHORT (class, cp); + cp += INT32SZ; /* TTL */ + GETSHORT (n, cp); + + if (class == C_IN && type == T_PTR) + { + n = dn_expand (answer->buf, end_of_message, cp, bp, linebuflen); + if (n < 0 || !res_hnok (bp)) + { + /* XXX What does this mean? The original form from bind + returns NULL. Incrementing cp has no effect in any case. + What should I return here. ??? */ + cp += n; + return NSS_STATUS_UNAVAIL; + } + cp += n; + *alias_pointer++ = bp; + bp += strlen (bp) + 1; + result->n_addrtype = class == C_IN ? AF_INET : AF_UNSPEC; + ++have_answer; + } + } + + if (have_answer) + { + char *tmp; + int len; + char *in, *cp, *rp, *wp; + int cnt, first_flag; + + *alias_pointer = NULL; + switch (net_i) + { + case BYADDR: + result->n_name = result->n_aliases[0]; + result->n_net = 0L; + break; + case BYNAME: + len = strlen (result->n_aliases[0]); + tmp = (char *) alloca (len + 1); + tmp[len] = 0; + wp = &tmp[len - 1]; + + rp = in = result->n_aliases[0]; + result->n_name = ans; + + first_flag = 1; + for (cnt = 0; cnt < 4; ++cnt) + { + char *startp; + + startp = rp; + while (*rp != '.') + ++rp; + if (rp - startp > 1 || *startp != '0' || !first_flag) + { + first_flag = 0; + if (cnt > 0) + *wp-- = '.'; + cp = rp; + while (cp > startp) + *wp-- = *--cp; + } + in = rp + 1; + } + + result->n_net = inet_network (wp); + break; + } + + ++result->n_aliases; + return NSS_STATUS_SUCCESS; + } + + /* XXX Really use global variable??? */ + h_errno = TRY_AGAIN; + return NSS_STATUS_TRYAGAIN; +} diff --git a/nss/nss_files/files-XXX.c b/nss/nss_files/files-XXX.c new file mode 100644 index 0000000000..40bb7df81e --- /dev/null +++ b/nss/nss_files/files-XXX.c @@ -0,0 +1,221 @@ +/* Common code for file-based databases in nss_files module. +Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <stdio.h> +#include <ctype.h> +#include <assert.h> +#include <libc-lock.h> +#include "nsswitch.h" + +/* These symbols are defined by the including source file: + + ENTNAME -- database name of the structure and functions (hostent, pwent). + STRUCTURE -- struct name, define only if not ENTNAME (passwd, group). + DATAFILE -- string of the database file's name. + + NEED_H_ERRNO - defined iff an arg `int *herrnop' is used. + MIDLINE_COMMENTS - defined iff # before \n terminates a database line. +*/ + +#define ENTNAME_r CONCAT(ENTNAME,_r) + +#ifdef NEED_H_ERRNO +#define H_ERRNO_PROTO , int *herrnop +#define H_ERRNO_ARG , herrnop +#define H_ERRNO_SET(val) (*herrnop = (val)) +#else +#define H_ERRNO_PROTO +#define H_ERRNO_ARG +#define H_ERRNO_SET(val) ((void) 0) +#endif + +/* Locks the static variables in this file. */ +__libc_lock_define_initialized (static, lock); + +/* Maintenance of the shared stream open on the database file. */ + +static FILE *stream; +static int keep_stream; + +/* Open database file if not already opened. */ +static int +internal_setent (int stayopen) +{ + int status = NSS_STATUS_SUCCESS; + + if (stream == NULL) + { + stream = fopen (DATAFILE, "r"); + + if (stream == NULL) + status = NSS_STATUS_UNAVAIL; + } + else + rewind (stream); + + /* Remember STAYOPEN flag. */ + if (stream != NULL) + keep_stream |= stayopen; + + return status; +} + + +/* Thread-safe, exported version of that. */ +int +CONCAT(_nss_files_set,ENTNAME) (int stayopen) +{ + int status; + + __libc_lock_lock (lock); + + status = internal_setent (stayopen); + + __libc_lock_unlock (lock); + + return status; +} + + +/* Close the database file. */ +static void +internal_endent (void) +{ + if (stream != NULL) + { + fclose (stream); + stream = NULL; + } + + /* Reset STAYOPEN flag. */ + keep_stream = 0; +} + + +/* Thread-safe, exported version of that. */ +int +CONCAT(_nss_files_end,ENTNAME) (void) +{ + __libc_lock_lock (lock); + + internal_endent (); + + __libc_lock_unlock (lock); + + return NSS_STATUS_SUCCESS; +} + +/* Parsing the database file into `struct STRUCTURE' data structures. */ + +static enum nss_status +internal_getent (struct STRUCTURE *result, + char *buffer, int buflen H_ERRNO_PROTO) +{ + char *p; + struct parser_data *data = (void *) buffer; + int linebuflen = buffer + buflen - data->linebuffer; + + /* Someone called internal_setent before calling us, so if the + stream is not open now the file could not be opened. */ + if (stream == NULL) + { + H_ERRNO_SET (NETDB_INTERNAL); + return NSS_STATUS_UNAVAIL; + } + + if (buflen < sizeof *data + 1) + { + errno = ERANGE; + return NSS_STATUS_NOTFOUND; + } + + do + { + p = fgets (data->linebuffer, linebuflen, stream); + if (p == NULL) + { + /* End of file or read error. */ + H_ERRNO_SET (HOST_NOT_FOUND); + return NSS_STATUS_NOTFOUND; + } + + /* Skip leading blanks. */ + while (isspace (*p)) + ++p; + } while (*p == '\0' || *p == '#' || /* Ignore empty and comment lines. */ + /* Parse the line. If it is invalid, loop to + get the next line of the file to parse. */ + ! parse_line (p, result, data, buflen)); + + /* Filled in RESULT with the next entry from the database file. */ + return NSS_STATUS_SUCCESS; +} + + +/* Return the next entry from the database file, doing locking. */ +int +CONCAT(_nss_files_get,ENTNAME_r) (struct STRUCTURE *result, + char *buffer, int buflen H_ERRNO_PROTO) +{ + /* Return next entry in host file. */ + int status; + + __libc_lock_lock (lock); + + status = internal_getent (result, buffer, buflen H_ERRNO_ARG); + + __libc_lock_unlock (lock); + + return status; +} + +/* Macro for defining lookup functions for this file-based database. + + NAME is the name of the lookup; e.g. `hostbyname'. + + PROTO describes the arguments for the lookup key; + e.g. `const char *hostname'. + + BREAK_IF_MATCH is a block of code which compares `struct STRUCTURE *result' + to the lookup key arguments and does `break;' if they match. */ + +#define DB_LOOKUP(name, break_if_match, proto...) \ +enum nss_status \ +_nss_files_get##name##_r (proto, \ + struct STRUCTURE *result, \ + char *buffer, int buflen H_ERRNO_PROTO) \ +{ \ + enum nss_status status; \ + \ + __libc_lock_lock (lock); \ + \ + /* Reset file pointer to beginning or open file. */ \ + internal_setent (keep_stream); \ + \ + while ((status = internal_getent (result, buffer, buflen H_ERRNO_ARG)) \ + == NSS_STATUS_SUCCESS) \ + { break_if_match } \ + \ + if (! keep_stream) \ + internal_endent (); \ + \ + __libc_lock_unlock (lock); \ + \ + return status; \ +} diff --git a/nss/nss_files/files-grp.c b/nss/nss_files/files-grp.c new file mode 100644 index 0000000000..6d528a6df2 --- /dev/null +++ b/nss/nss_files/files-grp.c @@ -0,0 +1,49 @@ +/* Group file parser in nss_files module. +Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <grp.h> + +#define STRUCTURE group +#define ENTNAME grent +#define DATAFILE "/etc/group" +struct grent_data {}; + +#define TRAILING_LIST_MEMBER gr_mem +#define TRAILING_LIST_SEPARATOR_P(c) ((c) == ',') +#include "files-parse.c" +LINE_PARSER +( + STRING_FIELD (result->gr_name, ISCOLON, 0); + STRING_FIELD (result->gr_passwd, ISCOLON, 0); + INT_FIELD (result->gr_gid, ISCOLON, 0, 10,); +) + +#include "files-XXX.c" + +DB_LOOKUP (grnam, + { + if (! strcmp (name, result->gr_name)) + break; + }, const char *name) + +DB_LOOKUP (grgid, + { + if (result->gr_gid == gid) + break; + }, gid_t gid) diff --git a/nss/nss_files/files-hosts.c b/nss/nss_files/files-hosts.c new file mode 100644 index 0000000000..dad818c941 --- /dev/null +++ b/nss/nss_files/files-hosts.c @@ -0,0 +1,111 @@ +/* Hosts file parser in nss_files module. +Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <netinet/in.h> +#include <arpa/inet.h> +#include <arpa/nameser.h> +#include <netdb.h> +#include <resolv.h> + + +/* Get implementation for some internal functions. */ +#include "../resolv/mapv4v6addr.h" +#include "../resolv/mapv4v6hostent.h" + + +#define ENTNAME hostent +#define DATAFILE _PATH_HOSTS + +struct hostent_data + { + unsigned char host_addr[16]; /* IPv4 or IPv6 address. */ + char *h_addr_ptrs[2]; /* Points to that and null terminator. */ + }; + +#define TRAILING_LIST_MEMBER h_aliases +#define TRAILING_LIST_SEPARATOR_P isspace +#include "files-parse.c" +LINE_PARSER +({ + char *addr; + + STRING_FIELD (addr, isspace, 1); + + /* Parse address. */ + if ((_res.options & RES_USE_INET6) + && inet_pton (AF_INET6, addr, entdata->host_addr) > 0) + { + result->h_addrtype = AF_INET6; + result->h_length = IN6ADDRSZ; + } + else if (inet_pton (AF_INET, addr, entdata->host_addr) > 0) + { + if (_res.options & RES_USE_INET6) + { + map_v4v6_address ((char *) entdata->host_addr, + (char *) entdata->host_addr); + result->h_addrtype = AF_INET6; + result->h_length = IN6ADDRSZ; + } + else + { + result->h_addrtype = AF_INET; + result->h_length = INADDRSZ; + } + } + else + /* Illegal address: ignore line. */ + return 0; + + /* Store a pointer to the addressin the expected form. */ + entdata->h_addr_ptrs[0] = entdata->host_addr; + entdata->h_addr_ptrs[1] = NULL; + result->h_addr_list = entdata->h_addr_ptrs; + + /* If we need the host entry in IPv6 form change it now. */ + if (_res.options & RES_USE_INET6) + { + char *bufptr = data->linebuffer; + int buflen = (char *) data + datalen - bufptr; + map_v4v6_hostent (result, &bufptr, &buflen); + } + + STRING_FIELD (result->h_name, isspace, 1); +}) + +#include "files-XXX.c" + +DB_LOOKUP (hostbyname, + { + char **ap; + if (! strcmp (name, result->h_name)) + break; + for (ap = result->h_aliases; *ap; ++ap) + if (! strcmp (name, *ap)) + break; + if (*ap) + break; + }, const char *name) + +DB_LOOKUP (hostbyaddr, + { + if (result->h_addrtype == type && result->h_length == len && + ! memcmp (addr, result->h_addr_list[0], len)) + break; + }, const char *addr, int len, int type) diff --git a/nss/nss_files/files-network.c b/nss/nss_files/files-network.c new file mode 100644 index 0000000000..504c420b04 --- /dev/null +++ b/nss/nss_files/files-network.c @@ -0,0 +1,54 @@ +/* Networks file parser in nss_files module. +Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <netinet/in.h> +#include <arpa/inet.h> +#include <netdb.h> + +#define ENTNAME netent +#define DATAFILE _PATH_NETWORKS + +struct netent_data {}; + +#define TRAILING_LIST_MEMBER n_aliases +#define TRAILING_LIST_SEPARATOR_P isspace +#include "files-parse.c" +LINE_PARSER +({ + char *addr; + + STRING_FIELD (result->n_name, isspace, 1); + + STRING_FIELD (addr, isspace, 1); + result->n_net = inet_network (addr); + +}) + +#include "files-XXX.c" + +DB_LOOKUP (netbyname, + LOOKUP_NAME (n_name, n_aliases), + const char *name) + +DB_LOOKUP (netbyaddr, + { + if (result->n_addrtype == type && result->n_net == net) + /* Bingo! */ + break; + }, int type, unsigned long int net) diff --git a/nss/nss_files/files-parse.c b/nss/nss_files/files-parse.c new file mode 100644 index 0000000000..a93bee1ab3 --- /dev/null +++ b/nss/nss_files/files-parse.c @@ -0,0 +1,171 @@ +/* Common code for file-based database parsers in nss_files module. +Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <ctype.h> +#include <errno.h> +#include <string.h> +#include <stdlib.h> + + +#define CONCAT(a,b) CONCAT1(a,b) +#define CONCAT1(a,b) a##b + +#ifndef STRUCTURE +#define STRUCTURE ENTNAME +#endif + + +struct parser_data + { + struct CONCAT(ENTNAME,_data) entdata; + char linebuffer[0]; + }; + +#define LINE_PARSER(BODY) \ +static inline int \ +parse_line (char *line, struct STRUCTURE *result, \ + struct parser_data *data, int datalen) \ +{ \ + struct CONCAT(ENTNAME,_data) *const entdata __attribute__ ((unused)) \ + = &data->entdata; \ + BODY; \ + TRAILING_LIST_PARSER; \ + return 1; \ +} + + +/* Comments can come mid-line; trim the line at the first # seen. */ +#define MIDLINE_COMMENTS \ + { \ + char *p = strchr (line, '#'); \ + if (p) \ + *p = '\0'; \ + } + +#define STRING_FIELD(variable, terminator_p, swallow) \ + { \ + variable = line; \ + while (!terminator_p (*line)) \ + if (*++line == '\0') \ + return 0; \ + *line = '\0'; \ + do \ + ++line; \ + while (swallow && terminator_p (*line)); \ + } + +#define INT_FIELD(variable, terminator_p, swallow, base, convert) \ + { \ + char *endp; \ + variable = convert (strtol (line, &endp, base)); \ + if (endp == line) \ + return 0; \ + else if (terminator_p (*endp)) \ + do \ + ++endp; \ + while (swallow && terminator_p (*endp)); \ + else if (*endp != '\0') \ + return 0; \ + line = endp; \ + } + +#define ISCOLON(c) ((c) == ':') + + +#ifndef TRAILING_LIST_MEMBER +#define TRAILING_LIST_PARSER /* Nothing to do. */ +#else + +#define TRAILING_LIST_PARSER \ +{ \ + char **list = parse_list (line, data, datalen); \ + if (list) \ + result->TRAILING_LIST_MEMBER = list; \ + else \ + return 0; \ +} + +static inline char ** +parse_list (char *line, struct parser_data *data, int datalen) +{ + char *eol, **list, **p; + + /* Find the end of the line buffer. */ + eol = strchr (line, '\0'); + /* Adjust the pointer so it is aligned for storing pointers. */ + eol += (eol - (char *) 0) % __alignof__ (char *); + /* We will start the storage here for the vector of pointers. */ + list = (char **) eol; + + p = list; + while (1) + { + char *elt; + + if ((char *) &p[1] - (char *) data > datalen) + { + /* We cannot fit another pointer in the buffer. */ + errno = ERANGE; + return NULL; + } + if (*line == '\0') + break; + + elt = line; + while (1) + { + if (TRAILING_LIST_SEPARATOR_P (*line)) + { + *p++ = elt; + *line = '\0'; + do + ++line; + while (TRAILING_LIST_SEPARATOR_P (*line)); + } + else if (*line == '\0' || *line == '\n') + { + /* End of the line. */ + if (line > elt) + /* Last element. */ + *p++ = elt; + *line = '\0'; + break; + } + else + ++line; + } + } + *p = NULL; + + return list; +} + +#define LOOKUP_NAME(nameelt, aliaselt) \ +{ \ + char **ap; \ + if (! strcmp (name, result->nameelt)) \ + break; \ + for (ap = result->aliaselt; *ap; ++ap) \ + if (! strcmp (name, *ap)) \ + break; \ + if (*ap) \ + break; \ +} + +#endif diff --git a/nss/nss_files/files-proto.c b/nss/nss_files/files-proto.c new file mode 100644 index 0000000000..d67f8db8f6 --- /dev/null +++ b/nss/nss_files/files-proto.c @@ -0,0 +1,48 @@ +/* Protocols file parser in nss_files module. +Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <netdb.h> + + +#define ENTNAME protoent +#define DATAFILE _PATH_PROTOCOLS + +struct protoent_data {}; + +#define TRAILING_LIST_MEMBER p_aliases +#define TRAILING_LIST_SEPARATOR_P isspace +#include "files-parse.c" +LINE_PARSER +( + MIDLINE_COMMENTS; + STRING_FIELD (result->p_name, isspace, 1); + INT_FIELD (result->p_proto, isspace, 1, 10,); + ) + +#include "files-XXX.c" + +DB_LOOKUP (protobyname, + LOOKUP_NAME (p_name, p_aliases), + const char *name) + +DB_LOOKUP (protobynumber, + { + if (result->p_proto == proto) + break; + }, int proto) diff --git a/nss/nss_files/files-pwd.c b/nss/nss_files/files-pwd.c new file mode 100644 index 0000000000..4b6a4b737f --- /dev/null +++ b/nss/nss_files/files-pwd.c @@ -0,0 +1,54 @@ +/* User file parser in nss_files module. +Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <pwd.h> + +#define STRUCTURE passwd +#define ENTNAME pwent +#define DATAFILE "/etc/passwd" +struct pwent_data {}; + +#include "files-parse.c" +LINE_PARSER +({ + STRING_FIELD (result->pw_name, ISCOLON, 0); + STRING_FIELD (result->pw_passwd, ISCOLON, 0); + INT_FIELD (result->pw_uid, ISCOLON, 0, 10,); + INT_FIELD (result->pw_gid, ISCOLON, 0, 10,); + STRING_FIELD (result->pw_gecos, ISCOLON, 0); + STRING_FIELD (result->pw_dir, ISCOLON, 0); + result->pw_shell = line; + line = strchr (line, '\n'); + if (line) + *line = '\0'; +}) + +#include "files-XXX.c" + +DB_LOOKUP (pwnam, + { + if (! strcmp (name, result->pw_name)) + break; + }, const char *name) + +DB_LOOKUP (pwuid, + { + if (result->pw_uid == uid) + break; + }, uid_t uid) diff --git a/nss/nss_files/files-rpc.c b/nss/nss_files/files-rpc.c new file mode 100644 index 0000000000..fef0ff88b1 --- /dev/null +++ b/nss/nss_files/files-rpc.c @@ -0,0 +1,48 @@ +/* SunRPC program number file parser in nss_files module. +Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <rpc/netdb.h> + + +#define ENTNAME rpcent +#define DATAFILE "/etc/rpc" + +struct rpcent_data {}; + +#define TRAILING_LIST_MEMBER r_aliases +#define TRAILING_LIST_SEPARATOR_P isspace +#include "files-parse.c" +LINE_PARSER +( + MIDLINE_COMMENTS; + STRING_FIELD (result->r_name, isspace, 1); + INT_FIELD (result->r_number, isspace, 1, 10,); + ) + +#include "files-XXX.c" + +DB_LOOKUP (rpcbyname, + LOOKUP_NAME (r_name, r_aliases), + const char *name) + +DB_LOOKUP (rpcbynumber, + { + if (result->r_number == number) + break; + }, int number) diff --git a/nss/nss_files/files-service.c b/nss/nss_files/files-service.c new file mode 100644 index 0000000000..3bcb48787a --- /dev/null +++ b/nss/nss_files/files-service.c @@ -0,0 +1,51 @@ +/* Services file parser in nss_files module. +Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 675 Mass Ave, +Cambridge, MA 02139, USA. */ + +#include <netinet/in.h> +#include <netdb.h> + + +#define ENTNAME servent +#define DATAFILE _PATH_SERVICES + +struct servent_data {}; + +#define TRAILING_LIST_MEMBER s_aliases +#define TRAILING_LIST_SEPARATOR_P isspace +#include "files-parse.c" +#define ISSLASH(c) ((c) == '/') +LINE_PARSER +( + MIDLINE_COMMENTS; + STRING_FIELD (result->s_name, isspace, 1); + INT_FIELD (result->s_port, ISSLASH, 10, 0, htons); + STRING_FIELD (result->s_proto, isspace, 1); + ) + +#include "files-XXX.c" + +DB_LOOKUP (servbyname, + LOOKUP_NAME (s_name, s_aliases), + const char *name) + +DB_LOOKUP (servbyport, + { + if (result->s_port == port) + break; + }, int port) diff --git a/nss/nsswitch.c b/nss/nsswitch.c new file mode 100644 index 0000000000..4c2ccf692f --- /dev/null +++ b/nss/nsswitch.c @@ -0,0 +1,588 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. +Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#include <ctype.h> +#include <dlfcn.h> +#include <netdb.h> +#include <libc-lock.h> +#include <search.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "nsswitch.h" +#include "../elf/link.h" /* We need some help from ld.so. */ + +/* Prototypes for the local functions. */ +static void nss_init (void); +static void *nss_lookup_function (service_user *ni, const char *fct_name); +static int nss_find_entry (struct entry **knownp, const char *key, + void **valp); +static void nss_insert_entry (struct entry **knownp, const char *key, + void *val); +static name_database *nss_parse_file (const char *fname); +static name_database_entry *nss_getline (char *line); +static service_library *nss_new_service (name_database *database, + const char *name); + + +__libc_lock_define_initialized (static, lock); + + +/* Global variable. */ +struct __res_state _res; + + +/* Known aliases for service names. */ +static struct { + const char *alias; + const char *value; +} service_alias[] = +{ + { "nis+", "nisplus" }, + { "yp", "nis" } +}; + + +/* Nonzero if the sevices are already initialized. */ +static int nss_initialized; + + +/* The root of the whole data base. */ +static name_database *service_table; + + +static void +nss_init (void) +{ + /* Prevent multiple threads to change the service table. */ + __libc_lock_lock (lock); + + if (service_table == NULL) + service_table = nss_parse_file (_PATH_NSSWITCH_CONF); + + __libc_lock_unlock (lock); +} + + +/* -1 == database not found + 0 == database entry pointer stored */ +int +__nss_database_lookup (const char *database, service_user **ni) +{ + /* Return first `service_user' entry for DATABASE. + XXX Will use perfect hashing function for known databases. */ + name_database_entry *entry; + + /* Test whether configuration data is available. */ + if (service_table == NULL) + { + if (nss_initialized == 0) + nss_init (); + + if (service_table == NULL) + return -1; + } + + /* XXX Could use some faster mechanism here. But each database is + only requested once and so this might not be critical. */ + for (entry = service_table->entry; entry != NULL; entry = entry->next) + if (strcmp (database, entry->name) == 0) + break; + + if (entry == NULL || (*ni = entry->service) == NULL) + return -1; + + return 0; +} + + +/* -1 == not found + 0 == adjusted for next function */ +int +__nss_lookup (service_user **ni, const char *fct_name, void **fctp) +{ + *fctp = nss_lookup_function (*ni, fct_name); + + while (*fctp == NULL + && nss_next_action (*ni, NSS_STATUS_UNAVAIL) == NSS_ACTION_CONTINUE + && (*ni)->next != NULL) + { + *ni = (*ni)->next; + + *fctp = nss_lookup_function (*ni, fct_name); + } + + return *fctp != NULL ? 0 : -1; +} + + +/* -1 == not found + 0 == adjusted for next function + 1 == finished */ +int +__nss_next (service_user **ni, const char *fct_name, void **fctp, int status, + int all_values) +{ + if (all_values) + { + if (nss_next_action (*ni, NSS_STATUS_TRYAGAIN) == NSS_ACTION_RETURN + && nss_next_action (*ni, NSS_STATUS_UNAVAIL) == NSS_ACTION_RETURN + && nss_next_action (*ni, NSS_STATUS_NOTFOUND) == NSS_ACTION_RETURN + && nss_next_action (*ni, NSS_STATUS_SUCCESS) == NSS_ACTION_RETURN) + return 1; + } + else + { + /* This is really only for debugging. */ + if (NSS_STATUS_TRYAGAIN > status || status > NSS_STATUS_SUCCESS) + __libc_fatal ("illegal status in " __FUNCTION__); + + if (nss_next_action (*ni, status) == NSS_ACTION_RETURN) + return 1; + } + + if ((*ni)->next == NULL) + return -1; + + do + { + *ni = (*ni)->next; + + *fctp = nss_lookup_function (*ni, fct_name); + } + while (*fctp == NULL + && nss_next_action (*ni, NSS_STATUS_UNAVAIL) == NSS_ACTION_CONTINUE + && (*ni)->next != NULL); + + return *fctp != NULL ? 0 : -1; +} + + +static int +nss_dlerror_run (void (*operate) (void)) +{ + const char *last_errstring = NULL; + const char *last_object_name = NULL; + + (void) _dl_catch_error (&last_errstring, &last_object_name, operate); + + return last_errstring != NULL; +} + + +static void * +nss_lookup_function (service_user *ni, const char *fct_name) +{ + void *result; + + /* Determine whether current function is loaded. */ + if (nss_find_entry (&ni->known, fct_name, &result) >= 0) + return result; + + /* If we failed to allocate the needed data structures for the + service return an error. This should only happen when we are out + of memory. */ + if (ni->library == NULL) + return NULL; + + /* We now modify global data. Protect it. */ + __libc_lock_lock (lock); + + if (ni->library->lib_handle == NULL) + { + /* Load the shared library. */ + size_t shlen = (7 + strlen (ni->library->name) + 3 + + sizeof (NSS_SHLIB_REVISION)); + char shlib_name[shlen]; + + void do_open (void) + { + /* The used function is found in GNU ld.so. XXX The first + argument to _dl_open used to be `_dl_loaded'. But this + does (currently) not work. */ + ni->library->lib_handle = _dl_open (shlib_name, RTLD_LAZY); + } + + /* Construct name. */ + __stpcpy (__stpcpy (__stpcpy (shlib_name, "libnss_"), ni->library->name), + ".so" NSS_SHLIB_REVISION); + + if (nss_dlerror_run (do_open) != 0) + /* Failed to load the library. */ + ni->library->lib_handle = (void *) -1; + } + + if (ni->library->lib_handle == (void *) -1) + /* Library not found => function not found. */ + result = NULL; + else + { + /* Get the desired function. Again, GNU ld.so magic ahead. */ + size_t namlen = (5 + strlen (ni->library->name) + 1 + + strlen (fct_name) + 1); + char name[namlen]; + struct link_map *map = ni->library->lib_handle; + Elf32_Addr loadbase; + const Elf32_Sym *ref = NULL; + void get_sym (void) + { + struct link_map *scope[2] = { map, NULL }; + loadbase = _dl_lookup_symbol (name, &ref, scope, map->l_name, 0, 0); + } + + __stpcpy (__stpcpy (__stpcpy (__stpcpy (name, "_nss_"), + ni->library->name), + "_"), + fct_name); + + result = (nss_dlerror_run (get_sym) + ? NULL : (void *) (loadbase + ref->st_value)); + } + + /* Remember function pointer for the usage. */ + nss_insert_entry (&ni->known, fct_name, result); + + /* Remove the lock. */ + __libc_lock_unlock (lock); + + return result; +} + + +static int +known_compare (const void *p1, const void *p2) +{ + known_function *v1 = (known_function *) p1; + known_function *v2 = (known_function *) p2; + + return strcmp (v1->fct_name, v2->fct_name); +} + + +static int +nss_find_entry (struct entry **knownp, const char *key, void **valp) +{ + known_function looking_for = { fct_name: key }; + struct entry **found; + + found = __tfind (&looking_for, (const void **) knownp, known_compare); + + if (found == NULL) + return -1; + + *valp = ((known_function *) (*found)->key)->fct_ptr; + + return 0; +} + + +static void +nss_insert_entry (struct entry **knownp, const char *key, void *val) +{ + known_function *to_insert; + + to_insert = (known_function *) malloc (sizeof (known_function)); + if (to_insert == NULL) + return; + + to_insert->fct_name = key; + to_insert->fct_ptr = val; + + __tsearch (to_insert, (void **) knownp, known_compare); +} + + +static name_database * +nss_parse_file (const char *fname) +{ + FILE *fp; + name_database *result; + name_database_entry *last; + char *line; + size_t len; + + /* Open the configuration file. */ + fp = fopen (fname, "r"); + if (fp == NULL) + return NULL; + + result = (name_database *) malloc (sizeof (name_database)); + if (result == NULL) + return NULL; + + result->entry = NULL; + result->library = NULL; + last = NULL; + line = NULL; + len = 0; + do + { + name_database_entry *this; + ssize_t n; + char *cp; + + n = getline (&line, &len, fp); + if (n < 0) + break; + if (line[n - 1] == '\n') + line[n - 1] = '\0'; + + /* Because the file format does not know any form of quoting we + can search forward for the next '#' character and if found + make it terminating the line. */ + cp = strchr (line, '#'); + if (cp != NULL) + *cp = '\0'; + + /* If the line is blank it is ignored. */ + if (line[0] == '\0') + continue; + + /* Each line completely specifies the actions for a database. */ + this = nss_getline (line); + if (this != NULL) + { + if (last != NULL) + last->next = this; + else + result->entry = this; + + last = this; + } + } + while (!feof (fp)); + + /* Free the buffer. */ + free (line); + /* Close configuration file. */ + fclose (fp); + + /* Now create for each service we could use an entry in LIBRARY list. */ + for (last = result->entry; last != NULL; last = last->next) + { + service_user *runp; + + for (runp = last->service; runp != NULL; runp = runp->next) + runp->library = nss_new_service (result, runp->name); + } + + return result; +} + + +static name_database_entry * +nss_getline (char *line) +{ + const char *name; + name_database_entry *result; + service_user *last; + + /* Ignore leading white spaces. ATTENTION: this is different from + what is implemented in Solaris. The Solaris man page says a line + beginning with a white space character is ignored. We regard + this as just another misfeature in Solaris. */ + while (isspace (line[0])) + ++line; + + /* Recognize `<database> ":"'. */ + name = line; + while (line[0] != '\0' && !isspace (line[0]) && line[0] != ':') + ++line; + if (line[0] == '\0' || name == line) + /* Syntax error. */ + return NULL; + *line++ = '\0'; + + result = (name_database_entry *) malloc (sizeof (name_database_entry)); + if (result == NULL) + return NULL; + + result->name = strdup (name); + if (result->name == NULL) + { + free (result); + return NULL; + } + result->service = NULL; + result->next = NULL; + last = NULL; + + /* Read the source names: `<source> ( "[" <status> "=" <action> "]" )*'. */ + while (1) + { + service_user *new_service; + size_t n; + + while (isspace (line[0])) + ++line; + if (line[0] == '\0') + /* No source specified. */ + return result; + + /* Read <source> identifier. */ + name = line; + while (line[0] != '\0' && !isspace (line[0]) && line[0] != '[') + ++line; + if (name == line) + return result; + + + new_service = (service_user *) malloc (sizeof (service_user)); + if (new_service == NULL) + return result; + + /* Test whether the source name is one of the aliases. */ + for (n = 0; n < sizeof (service_alias) / sizeof (service_alias[0]); ++n) + if (strncmp (service_alias[n].alias, name, line - name) == 0 + && service_alias[n].alias[line - name] == '\0') + break; + + if (n < sizeof (service_alias) / sizeof (service_alias[0])) + new_service->name = service_alias[n].value; + else + { + char *source = (char *) malloc (line - name + 1); + if (source == NULL) + { + free (new_service); + return result; + } + memcpy (source, name, line - name); + source[line - name] = '\0'; + + new_service->name = source; + } + + /* Set default actions. */ + new_service->actions[2 + NSS_STATUS_TRYAGAIN] = NSS_ACTION_CONTINUE; + new_service->actions[2 + NSS_STATUS_UNAVAIL] = NSS_ACTION_CONTINUE; + new_service->actions[2 + NSS_STATUS_NOTFOUND] = NSS_ACTION_CONTINUE; + new_service->actions[2 + NSS_STATUS_SUCCESS] = NSS_ACTION_RETURN; + new_service->library = NULL; + new_service->known = NULL; + new_service->next = NULL; + + while (isspace (line[0])) + ++line; + + if (line[0] == '[') + { + int status; + + /* Read criterions. */ + do + ++line; + while (line[0] != '\0' && isspace (line[0])); + + do + { + /* Read status name. */ + name = line; + while (line[0] != '\0' && !isspace (line[0]) && line[0] != '=' + && line[0] != ']') + ++line; + + /* Compare with known statii. */ + if (line - name == 7) + { + if (strncasecmp (name, "SUCCESS", 7) == 0) + status = NSS_STATUS_SUCCESS; + else if (strncasecmp (name, "UNAVAIL", 7) == 0) + status = NSS_STATUS_UNAVAIL; + else + return result; + } + else if (line - name == 8) + { + if (strncasecmp (name, "NOTFOUND", 8) == 0) + status = NSS_STATUS_NOTFOUND; + else if (strncasecmp (name, "TRYAGAIN", 8) == 0) + status = NSS_STATUS_TRYAGAIN; + else + return result; + } + else + return result; + + while (isspace (line[0])) + ++line; + if (line[0] != '=') + return result; + do + ++line; + while (isspace (line[0])); + + name = line; + while (line[0] != '\0' && !isspace (line[0]) && line[0] != '=' + && line[0] != ']') + ++line; + + if (line - name == 6 && strncasecmp (name, "RETURN", 6) == 0) + new_service->actions[2 + status] = NSS_ACTION_RETURN; + else if (line - name == 8 + && strncasecmp (name, "CONTINUE", 8) == 0) + new_service->actions[2 + status] = NSS_ACTION_CONTINUE; + else + return result; + + /* Match white spaces. */ + while (isspace (line[0])) + ++line; + } + while (line[0] != ']'); + + /* Skip the ']'. */ + ++line; + } + + if (last == NULL) + result->service = new_service; + else + last->next = new_service; + last = new_service; + } + /* NOTREACHED */ + return NULL; +} + + +static service_library * +nss_new_service (name_database *database, const char *name) +{ + service_library **currentp = &database->library; + + while (*currentp != NULL) + { + if (strcmp ((*currentp)->name, name) == 0) + return *currentp; + currentp = &(*currentp)->next; + } + + /* We have to add the new service. */ + *currentp = (service_library *) malloc (sizeof (service_library)); + if (*currentp == NULL) + return NULL; + + (*currentp)->name = name; + (*currentp)->lib_handle = NULL; + (*currentp)->next = NULL; + + return *currentp; +} diff --git a/nss/nsswitch.h b/nss/nsswitch.h new file mode 100644 index 0000000000..f597a58860 --- /dev/null +++ b/nss/nsswitch.h @@ -0,0 +1,138 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#ifndef _NSSWITCH_H +#define _NSSWITCH_H 1 + +/* This is an *internal* header. */ + +#include <arpa/nameser.h> +#include <netinet/in.h> +#include <resolv.h> +#include <search.h> + + +/* Revision number of NSS interface (must be a string). */ +#define NSS_SHLIB_REVISION ".1" + + +/* Possible results of lookup using a nss_* function. */ +enum nss_status +{ + NSS_STATUS_TRYAGAIN = -2, + NSS_STATUS_UNAVAIL, + NSS_STATUS_NOTFOUND, + NSS_STATUS_SUCCESS, +}; + + +/* Actions performed after lookup finished. */ +typedef enum +{ + NSS_ACTION_CONTINUE, + NSS_ACTION_RETURN +} lookup_actions; + + +typedef struct service_library +{ + /* Name of service (`files', `dns', `nis', ...). */ + const char *name; + /* Pointer to the loaded shared library. */ + void *lib_handle; + /* And the link to the next entry. */ + struct service_library *next; +} service_library; + + +/* For mappng a function name to a function pointer. */ +typedef struct +{ + const char *fct_name; + void *fct_ptr; +} known_function; + + +typedef struct service_user +{ + /* Name of the service (`files', `dns', `nis', ...). */ + const char *name; + /* Action according to result. */ + lookup_actions actions[4]; + /* Link to the underlying library object. */ + service_library *library; + /* Collection of known functions. */ + struct entry *known; + /* And the link to the next entry. */ + struct service_user *next; +} service_user; + +/* To access the action based on the status value use this macro. */ +#define nss_next_action(ni, status) ((ni)->actions[2 + status]) + + +typedef struct name_database_entry +{ + /* Name of the database. */ + const char *name; + /* List of service to be used. */ + service_user *service; + /* And the link to the next entry. */ + struct name_database_entry *next; +} name_database_entry; + + +typedef struct name_database +{ + /* List of all known databases. */ + name_database_entry *entry; + /* List of libraries with service implementation. */ + service_library *library; +} name_database; + + +/* Interface functions for NSS. */ + +/* Get the data structure representing the specified database. More + than one function can use the database. */ +int __nss_database_lookup (const char *database, service_user **ni); + + +/* Put first function with name FCT_NAME for SERVICE in FCTP. The + position is remembered in NI. The function returns a value < 0 if + an error occured or no such function exists. */ +int __nss_lookup (service_user **ni, const char *fct_name, void **fctp); + +/* Determine the next step in the lookup process according to the + result STATUS of the call to the last function returned by + `__nss_lookup' or `__nss_next'. NI specifies the last function + examined. The function return a value > 0 if the process should + stop with the last result of the last function call to be the + result of the entire lookup. The returned valie is 0 if there is + another function to use and < 0 if an error occured. + + If ALL_VALUES is nonzero, the return value will not be > 0 as long as + there is a possibility the lookup process can ever use following + services. In other words, only if all four lookup results have + the action RETURN associated the lookup process stops before the + natural end. */ +int __nss_next (service_user **ni, const char *fct_name, void **fctp, + int status, int all_values); + + +#endif /* nsswitch.h */ diff --git a/nss/proto-lookup.c b/nss/proto-lookup.c new file mode 100644 index 0000000000..f27ff591d9 --- /dev/null +++ b/nss/proto-lookup.c @@ -0,0 +1,22 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. +Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#define DATABASE_NAME protocols + +#include "XXX-lookup.c" diff --git a/nss/pwd-lookup.c b/nss/pwd-lookup.c new file mode 100644 index 0000000000..e792560bad --- /dev/null +++ b/nss/pwd-lookup.c @@ -0,0 +1,22 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. +Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#define DATABASE_NAME passwd + +#include "XXX-lookup.c" diff --git a/nss/rpc-lookup.c b/nss/rpc-lookup.c new file mode 100644 index 0000000000..f49359ad2b --- /dev/null +++ b/nss/rpc-lookup.c @@ -0,0 +1,22 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. +Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#define DATABASE_NAME rpc + +#include "XXX-lookup.c" diff --git a/nss/service-lookup.c b/nss/service-lookup.c new file mode 100644 index 0000000000..c1a3256add --- /dev/null +++ b/nss/service-lookup.c @@ -0,0 +1,22 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. +This file is part of the GNU C Library. +Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. + +The GNU C Library is free software; you can redistribute it and/or +modify it under the terms of the GNU Library General Public License as +published by the Free Software Foundation; either version 2 of the +License, or (at your option) any later version. + +The GNU C Library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +Library General Public License for more details. + +You should have received a copy of the GNU Library General Public +License along with the GNU C Library; see the file COPYING.LIB. If +not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, +Boston, MA 02111-1307, USA. */ + +#define DATABASE_NAME services + +#include "XXX-lookup.c" |